Not necessary I could use the ubs hub if I have 5 arduino mini pro 
is not suitable to work as HID keyboard
´Micro pro’
you will have hard time to exhaust 1 single micro pro due to shift registers and multiplexers
How do I do it then?
daisy chain shift registers (74hc165), its inputs connect with pulled up switches and buttons;
potentiometers connect to multiplexers (74HC4067)
or PCF8575(wait, this one is not analog input featured)
We must not forget that I have 74 buttons
no encoders?
Can't I use a key map?
That way I could use a multiplexer for 64 buttons
#include <Arduino.h>
#include <CD74HC4067.h> // Bibliothèque pour utiliser le multiplexeur CD74HC4067
#include <HID-Project.h> // Bibliothèque pour créer un périphérique HID
// Définir les broches de sélection du premier multiplexeur
CD74HC4067 mux1(2, 3, 4, 5); // S0, S1, S2, S3 pour le premier multiplexeur
// Définir les broches de sélection du deuxième multiplexeur
CD74HC4067 mux2(6, 7, 8, 9); // S0, S1, S2, S3 pour le deuxième multiplexeur
// Déclaration des touches associées aux boutons (74 boutons au total)
const uint8_t buttonKeys[74] = {
// Multiplexeur 1 (62 boutons)
CMD_PROG, CMD_PERF, CMD_INIT, CMD_DATA, CMD_FPLN, CMD_RAD_NAV, CMD_FUEL_PRED, CMD_SEC_FPLN,
CMD_ATC_COMM, CMD_MCDU_MENU, CMD_BRT, CMD_DIM, CMD_FPLN, CMD_RAD_NAV, CMD_FUEL_PRED, CMD_SEC_FPLN,
CMD_ATC_COMM, CMD_MCDU_MENU, CMD_BRT, CMD_DIM,
CMD_1, CMD_2, CMD_3, CMD_4, CMD_5, CMD_6, CMD_7, CMD_8, CMD_9, CMD_0, CMD_SLASH, CMD_SP, CMD_CLR,
CMD_A, CMD_B, CMD_C, CMD_D, CMD_E, CMD_F, CMD_G, CMD_H, CMD_I, CMD_J, CMD_K, CMD_L, CMD_M, CMD_N,
CMD_O, CMD_P, CMD_Q, CMD_R, CMD_S, CMD_T, CMD_U, CMD_V, CMD_W, CMD_X, CMD_Y, CMD_Z,
CMD_FLT_NBR, CMD_IN_USE, CMD_OPTIONS, CMD_RETURN, CMD_FMGC, CMD_ATSU, CMD_AIDS, CMD_CFDS,
CMD_V1, CMD_V2, CMD_V3, // Les trois boutons sans nom
// Multiplexeur 2 (12 boutons)
CMD_L1, CMD_L2, CMD_L3, CMD_L4, CMD_L5, CMD_L6, // Boutons à gauche
CMD_R1, CMD_R2, CMD_R3, CMD_R4, CMD_R5, CMD_R6 // Boutons à droite
};
void setup() {
Serial.begin(115200);
mux1.begin();
mux2.begin();
// Initialiser le clavier HID
Keyboard.begin();
}
void loop() {
// Gestion des boutons du premier multiplexeur
for (int buttonIndex = 0; buttonIndex < 62; buttonIndex++) {
mux1.channel(buttonIndex);
int buttonState = digitalRead(mux1.getPin());
if (buttonState == LOW) { // Bouton pressé
Serial.print("Button pressed: ");
Serial.println(buttonIndex);
// Envoyer la touche associée via HID
Keyboard.press(buttonKeys[buttonIndex]);
delay(100); // Petit délai pour éviter les rebonds
Keyboard.releaseAll();
}
}
// Gestion des boutons du deuxième multiplexeur
for (int buttonIndex = 0; buttonIndex < 12; buttonIndex++) {
mux2.channel(buttonIndex);
int buttonState = digitalRead(mux2.getPin());
if (buttonState == LOW) { // Bouton pressé
Serial.print("Button pressed: ");
Serial.println(62 + buttonIndex);
// Envoyer la touche associée via HID
Keyboard.press(buttonKeys[62 + buttonIndex]);
delay(100); // Petit délai pour éviter les rebonds
Keyboard.releaseAll();
}
}
delay(100); // Petit délai pour éviter les rebonds
}
Tins good this code ?
idk. it is not mine.
I did it but I can't test
Did what ?
I want to create this:
Inside there are 74 buttons and a screen, what I wanted to know is how to do so that I can use buttons to make personalized keys.
I looked at the 4 examples but nothing corresponds to what I want.
I want to make basic keyboard shortcuts like for example ALT+CTRL+A.
I want each button to be a name for example FMC_A